Class: Module

Inherits:
Object show all
Defined in:
lib/dolzenko/alias_method_chain_once.rb

Overview

Correct ‘alias_method_chain_once` implementation

Instance Method Summary collapse

Instance Method Details

#alias_method_chain_once(target, feature) ⇒ Object 



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# File 'lib/dolzenko/alias_method_chain_once.rb', line 5

def alias_method_chain_once(target, feature)
  aliased_target, punctuation = target.to_s.sub(/([?!=])$/, ''), $1
  without_method = "#{aliased_target}_without_#{feature}#{punctuation}"

  # `method_defined?` matches public and protected methods,
  # also `*_method_defined?` family of methods is the portable
  # way to check for method existence, while `public_methods.include?`
  # will work either on 1.8 or 1.9 (depending on where symbol or string
  # is provided as method name)
  unless method_defined?(without_method) ||
          private_method_defined?(without_method)
    alias_method_chain(target, feature)
  end
end